Diabetic Kidney Disease (Nephropathy): eGFR, Urine Albumin (uACR), and Renal Protection
Diabetic kidney disease (DKD) affects up to 40% of individuals with diabetes, developing silently through glomerular hyperfiltration, microalbuminuria, and progressive nephron loss. Review screening with urine albumin-to-creatinine ratio (uACR) and eGFR, and clinical pillar therapies: ACE/ARBs, SGLT2 inhibitors, and non-steroidal MRAs.
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Quick Summary & Key Findings
Diabetic kidney disease is diagnosed using two routine laboratory tests: estimated Glomerular Filtration Rate (eGFR <60 mL/min/1.73m²) and Urine Albumin-to-Creatinine Ratio (uACR ≥30 mg/g). Because kidney damage causes zero early symptoms, annual urine albumin screening is vital. Evidence-based renal protection relies on blood pressure control (<130/80 mmHg), SGLT2 inhibitors, ACE inhibitors or ARBs, and non-steroidal mineralocorticoid antagonists (finerenone).
The human kidneys contain approximately two million microscopic filtering units called nephrons. Within each nephron, specialized tufts of capillaries known as glomeruli filter metabolic waste from the bloodstream while retaining vital serum proteins like albumin.
In diabetic kidney disease (DKD), chronic hyperglycemia initiates a cascade of renal injury: high glomerular capillary pressure (hyperfiltration), advanced glycation end-product (AGE) accumulation, oxidative stress, and progressive podocyte loss. The glomerular basement membrane thickens, and the filtration barrier becomes permeable, allowing albumin to leak into the urine.
Because nephrons compensate for gradual damage until kidney function has declined by more than 50%, early detection through annual urine albumin-to-creatinine testing is essential for initiating modern disease-slowing medications before irreversible renal insufficiency develops.
The Two Essential Screening Tests: uACR and eGFR
The Four Pillars of Renal Protective Pharmacotherapy
Dietary and Lifestyle Management for Kidney Protection
Frequently Asked Questions
Dr. Nikhil Tandon, MBBS, MD, PhD, FAMS
Professor & Head, Department of Endocrinology & Metabolism, AIIMS New Delhi • MBBS, MD, PhD (Cantab), FAMSDr. Nikhil Tandon is Professor and Head of the Department of Endocrinology and Metabolism at the All India Institute of Medical Sciences (AIIMS), New Delhi. Recipient of the Padma Shri award, he is a leading international researcher in cardiometabolic health, diabetes epidemiology, and clinical trials.
References & Clinical Resources
- Clinical Research Faculty & Editorial Team. KDIGO 2023 Clinical Practice Guideline for the Management of Diabetes in Chronic Kidney Disease (2020-2026). [Access Resource Link] — Kidney International
- Clinical Research Faculty & Editorial Team. Dapagliflozin in Patients with Chronic Kidney Disease (DAPA-CKD) (2020-2026). [Access Resource Link] — New England Journal of Medicine
- Clinical Research Faculty & Editorial Team. Effects of Finerenone on Chronic Kidney Disease Outcomes in Type 2 Diabetes (FIDELIO-DKD) (2020-2026). [Access Resource Link] — New England Journal of Medicine
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